using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using FastReport.Utils;

namespace FastReport.Data
{
    /// <summary>
    /// Represents the collection of <see cref="CommandParameter"/> objects.
    /// </summary>
    /// <remarks>
    /// This class is used to store the list of parameters defined in the datasource. See the 
    /// <see cref="TableDataSource.Parameters"/> property for more details.
    /// </remarks>
    public class CommandParameterCollection : FRCollectionBase
    {
        /// <summary>
        /// Gets or sets a parameter.
        /// </summary>
        /// <param name="index">The index of a parameter in this collection.</param>
        /// <returns>The parameter with specified index.</returns>
        public CommandParameter this[int index]
        {
            get { return List[index] as CommandParameter; }
            set { List[index] = value; }
        }

        /// <summary>
        /// Finds a parameter by its name.
        /// </summary>
        /// <param name="name">The name of a parameter.</param>
        /// <returns>The <see cref="CommandParameter"/> object if found; otherwise <b>null</b>.</returns>
        public CommandParameter FindByName(string name)
        {
            foreach (CommandParameter c in this)
            {
                if (c.Name == name)
                    return c;
            }
            return null;
        }

        /// <summary>
        /// Returns an unique parameter name based on given name.
        /// </summary>
        /// <param name="name">The base name.</param>
        /// <returns>The unique name.</returns>
        public string CreateUniqueName(string name)
        {
            string baseName = name;
            int i = 1;
            while (FindByName(name) != null)
            {
                name = baseName + i.ToString();
                i++;
            }
            return name;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="CommandParameterCollection"/> class with default settings.
        /// </summary>
        /// <param name="owner">The owner of this collection.</param>
        public CommandParameterCollection(Base owner) : base(owner)
        {
        }
    }
}
